what happens to the weight of a body, when it is lifted to a height above the ground level?

Question

whether the weight will increase or decrease?

Answer 1

Weight is the same as force due to gravity. Newton showed that the Fg (Force of gravity) = (G * m1 * m2) / r^2 where G is the gravitational constant (6.67 * 10^-11); m1 and m2 are the two masses, e.g. the earth and your truck; r is the distance between the masses. The higher you raise the mass above earth, the greater r becomes, which reduces the force due to gravity or "Weight."

Answer 2

'Weight' is a term used to describe the gravitational effect of bodies (usually) in reference to the earth. The equation that describes how gravity effects bodies states that the distance between the bodies affects the gravitational pull. The further something is away, the less gravitational force is applied. The relationship between gravitational force and distance is an inverse square.

So in your example, as the body is elevated, the distance between the body and the earth increases, thus resulting in a lower 'weight'.

Just to make it clear, the difference in the weight in items at or near the surface will be extremely small. It will appear that the weight would not change, but in fact it would.

Answer 3

Surface Gravity = Gravitational Constant x Mass / R^2

The key to your question is with the parameter 'R' which represents how far Mass is from the center of gravity, in this case the center of Earth. If 'R' increases by moving the mass farther from the center of gravity (..lifting it to some height above ground level..) it's obvious that the strength of the gravitational field (..Surface Gravity..) will decrease.

Weight = Mass x Surface Gravity

In the above equation if 'Surface Gravity' decreases, which it has by moving the mass above ground level, then Weight will also decrease.

Answer 4

For lifted heights on the order of 1 to 10 times the height of the body, the weight decreases but to such a small extent it may not be measurable. For heights in the 100's of meters to kilometers the weight decreases, still negligibly but perhaps measurably. As you get to distances that are substantial fractions of the radius of the earth, the weight becomes noticably smaller and smaller.
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Answer 5

You're mass would not change. Your weight, as measured on a scale, is actually how much force gravity exerts on your mass.

If you lift an object off the ground, it's weight will change. The force of gravity between two objects depends on the mass of the objects and the distance between them. Unfortunately I don't have the equation handy to give you.

As a practical matter, you would have to lift an object a really long way above the surface of the earth to have any noticeable effect.

Answer 6

Weight or mass is something we measure because of gravity's pull. If someone weighs 150 pounds they will weigh 150 pounds 5, 10, 20, or 50 feet off the ground as long as the gravitation pull stays the same. The only way the weight would change is if the gravitational pull changes.

Answer 7

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Answer 8

nothing, because the earth has the same pull all around the earth as long as your not moving